The Kid Should See This

(NH4)2Cr2O7! Ammonium Dichromate Volcano

(NH4)2Cr2O7! Or… an Ammonium Dichromate Volcano!

With some heat, these (highly toxic) orange crystals will thermally decompose as they release heat, nitrogen, water and green dichromium (III) oxide ash. 

Via laboiteverte.fr.

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